The Far Call — Gordon R. Dickson

Jens Wylie would never leave Earth, but his heart was with the brave men and women of the first Mars Expedition, enchanted by the siren song of the stars. As U.S. Undersecretary of Space, he thought he could share some small part of that bold adventure. But as the mission progressed, Jens saw the sure signs of imminent disaster, a mission failure that could bring Earth's Space program to a halt. He knew that he must risk his future, and maybe even his life, to keep humanity on the road to the stars-the only question was whether he had the courage to do it.